I hope this is the right forum to post this, if not apologies. I've been trying to track down a book that's about the different adaptations of Tolkiens novels. it was published round about 2003/2004 and I can't remember the title or the authors. It has in depth analysis and reviews of the animated/radio and live action versions of the hobbit and lord of the rings and how they relate/change events and themes of the books.

any help in identifying it greatly appreciated as I want to find it on amazon but i can't remember the name of it